Apparatus and method for heating materials with a laser heat source
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United States of America Patent
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Jun 9, 1987
Grant Date -
N/A
app pub date -
Mar 21, 1985
filing date -
Mar 21, 1985
priority date (Note) -
Expired
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Abstract
An apparatus and method for heating materials with photoelectric radiant energy include directing photoelectric radiant energy onto a reflective conical member positioned at one focal line of an ellipsoidal reflective surface. The radiant energy is dispersed by the conical member and directed to the reflective wall. Radiant energy is further reflected by the ellipsoidal surface to an opposite focal line creating an area of intense radiant energy. Materials to be heated are introduced into the area of intense photoelectric radiant energy. Embodiments of the present invention are applicable to reacting silane and ammonia to form silicon nitride by laser pyrolysis.
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